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SUMMARY:Strongly correlated lattice polaritons - Dr Sebastian Schmidt (ETH
  Zurich)
DTSTART:20100527T131500Z
DTEND:20100527T144500Z
UID:TALK24009@talks.cam.ac.uk
CONTACT:Joe Bhaseen
DESCRIPTION:The recent experimental realization of strong light matter int
 eractions in cavity/circuit QED systems has triggered an immense interest 
 in quantum condensed and coherent photonic systems. The addressibility of 
 a cavity with external lasers\, device integration\, and high tunability m
 ake these optical systems ideally suited for quantum information and simul
 ation tasks.\n\nAn exciting question in this emerging field is whether one
  can realize a Superfluid - Mott insulator transition of strongly correlat
 ed lattice polaritons. The Jaynes-Cummings-Hubbard Model (JCHM) has been i
 ntroduced to describe such a quantum phase transition of light in an array
  of coupled QED cavities\, each containing a single photonic mode interact
 ing with a two-level system (qubit) [1]. In this talk we review recent the
 oretical results on the equilibrium phase diagram\, elementary excitations
  and critical exponents of the JCHM [3\,4] and\ndiscuss similarities and d
 ifferences with the seminal Bose-Hubbard model (BHM) describing ultra-cold
  atoms in optical lattices.\n\n[1] A. D. Greentree et al.\, Nature Phys. 4
 66\, 856 (2006).\n\n[2] S. Schmidt and G. Blatter\, Phys. Rev. Lett. 103\,
  086403 (2009).\n\n[3] S. Schmidt and G. Blatter\, Phys. Rev. Lett. 104\, 
 216402 (2010). 
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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